Also harbor freight has 99% On Fri, Feb 10, 2023, 12:05 AM Brian K. White <[email protected]> wrote:
> At any hardware store in the paint section, or any paint store, it's > called denatured alcohol not isopropyl. > > If you asked for isopropyl specifically, maybe you just got someone who > didn't know enough, they might have looked for Drygas in the automotive > section or actual isopropyl in the cleaning supplies or seasonal because > they might have actually carried it just for the pandemic even though > they normally don't carry that. > > Denatured isn't isopropyl, it's either ethanol or methanol, but it's a > lot more readily available and cheaper and works fine for cleaning > electronics. > > You can find 99.9% isopropyl for more $$ at electronics supply shops, > which you may not have any near by. Micro Center usually has it in their > maker section if you have one of those around. It's much more expensive. > > -- > bkw > > On 2/9/23 20:10, Daniel L wrote: > > OK, just got home from home depot. Had ammonia already in the garage, > > and have purchased cleaning vinegar. Home depot couldn't seem to have > > alcohol on hand and nor does lowes. Gonna try harbor freight next. > > Distilled water from rite aid next. > > > > On 2/9/23 16:23, [email protected] wrote: > >> > >> You want to use at least 90% alcohol. No rubbing alcohol with stuff > >> added to it. I use denatured alcohol from the hardware store 99.9%. > >> > >> Resolder the joints you need to. Don’t go crazy. Every joint you touch > >> is a chance to mess something up. I have been soldering for 40 years > >> and I live by this advice. > >> > >> Ammonia is available from any grocery in the cloths washing detergent > >> isle. > >> > >> Jeff Birt > >> > >> *From:* M100 <[email protected]> *On Behalf Of *Daniel > L > >> *Sent:* Thursday, February 9, 2023 5:36 PM > >> *To:* [email protected] > >> *Subject:* Re: [M100] stupid move = expected results > >> > >> On 2/9/23 05:17, [email protected] wrote: > >> > >> There are two different causes of corrosion here. The battery has > >> an alkaline electrolyte, after removing the battery neutralize the > >> electrolyte left on the PCB with a mild acid like vinegar or > >> citric acid. Then clean well. I like to remove the solder from > >> components that have been affected and resolder. The corrosion > >> will wick through the solder joint making it to the other side of > >> the PCB and eating the via. > >> > >> Good thing I have citric acid. Can I use normal alcohol you get from > >> the drug store? I will be re-soldering as many joints as possible to > >> refresh them after forty years. > >> > >> > >> The capacitor corrosion is much, much worse on the M100. Every > >> M100 that has not already been recapped needs done. It is one of > >> the few machines I always recap. The electrolyte in capacitors is > >> acidic. After removing the capacitors scrape the worst of the > >> corrosion off and then treat the area with a mild alkaline > >> solution to neutralize any remaining acid (ammonia, etc.) Clean > >> and repair damaged traces. > >> > >> Where do you get ammonia? > >> > >> I have covered this procedure in several videos. Go to YouTube and > >> search for ‘HeyBirt!’. And from my channel page search for ‘Model > >> 100’. > >> > >> I love your channel and have been a subscriber since before I got my > >> first m100. Actually, I called and left you a voicemail the other day. > >> > > > > -- > bkw > >
